subject:(polycrystalline structure)

NSYSU

1. Han Tsai, Cing. The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727114-154544

► The use of solving simulations using the finite element method has been developed over a long time, and mature software , such as ANSYS, MSC,… (more)

▼ The use of solving simulations using the finite element method has been developed over a long time, and mature software , such as ANSYS, MSC, Marc, and other packages, is available. Some of the software does not include enough material properties, and especially too few properties that are relate to temperature. Accordingly the results of simulations not close to the reality. The study uses the LAMMPS, which is software for simulating molecular dynamics, to simulate the experiments on the friction. The coefficient of the kinetic friction at high temperature is thus obtained. This work successfully developed a complete calculating package of coefficient of the kinetic friction. The user can change the metal and the temperature. Comparing experimental at room temperature in the literature with the results of the simulation yields a, single crystalline model error of 7.66% and a polycrystalline model error of 8.33%. This investigation discusses the effects of the frictional properties by copper on copper at various friction velocities, depth of ploughing and temperatures. In recent years, a few people have studied the polycrystalline model. In this work, not only a single crystalline model but also polycrystalline model is developed and utilized to describe the real structure of a material. The results obtained herein yield a depth of ploughing of 2.50 nm, a simulated temperature of 293.0 K and an increase in tip velocity from 100.0 m/s to 400.0 m/s. The coefficient of kinetic friction of the single crystalline structure decreased from 2.30 to 1.24 and that of the polycrystalline structure decreased from 1.86 to 1.44. When the tip velocity is 100 m/s, temperature is 293.0 K and the depth of ploughing increased from 1.00 nm to 2.50 nm. The coefficient of kinetic friction of the single crystal structure decreased from 4.30 to 2.30 and that of the polycrystalline structure is decreased from 2.25 to 1.86. Finally, when the tip velocity is 100 m/s, the depth of ploughing is 2.50 nm and temperature increased from 293.0 K to 1000.0 K. The single crystal structure decreased from 2.30 to 1.38 and that of the polycrystalline structure is maintained between 1.77 to 1.90. Advisors/Committee Members: CHChien (committee member), Jung-Hung Sun (chair), Chung-Ting Wang (chair), T. N. Shiau (chair).

Subjects/Keywords: molecular dynamics; temperature effects; polycrystalline structure; coefficient of kinetic friction; single crystal structure

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APA (6^th Edition):

Han Tsai, C. (2014). The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727114-154544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Han Tsai, Cing. “The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation.” 2014. Thesis, NSYSU. Accessed March 02, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727114-154544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Han Tsai, Cing. “The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation.” 2014. Web. 02 Mar 2021.

Vancouver:

Han Tsai C. The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation. [Internet] [Thesis]. NSYSU; 2014. [cited 2021 Mar 02]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727114-154544.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Han Tsai C. The Temperature Effects of Friction Properties Analysis in Single Crystalline and Polycrystalline Metal by Molecular Dynamics Simulation. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727114-154544

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

2. Lysáček, David. Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/7145

► The doctoral thesis deals with the structure and properties of the polycrystalline silicon layers deposited on the silicon wafers backside. The wafers are further used… (more)

Subjects/Keywords: polykrystalický křemík; getrace; multivrstevnaté struktury; chemická depozice z plynné fáze; polycrystalline silicon; gettering; multilayer structure; chemical vapor deposition

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lysáček, D. (2018). Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/7145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lysáček, David. “Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon.” 2018. Thesis, Brno University of Technology. Accessed March 02, 2021. http://hdl.handle.net/11012/7145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lysáček, David. “Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon.” 2018. Web. 02 Mar 2021.

Vancouver:

Lysáček D. Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/11012/7145.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lysáček D. Tenké vrstvy polykrystalického křemíku: Thin Films of Polycrystalline Silicon. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/7145

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

3. Lita, Adriana Eleni. Correlation between microstructure and surface structure evolution in polycrystalline films.

Degree: PhD, Materials science, 2000, University of Michigan

URL: http://hdl.handle.net/2027.42/132620

► There is significant interest in the structure of metal thin films due to their wide application as critical components in electronic, magnetic and optical devices.… (more)

▼ There is significant interest in the structure of metal thin films due to their wide application as critical components in electronic, magnetic and optical devices. The functionality of these devices is determined by the films physical structure that includes surface morphology and in the case of polycrystalline films, grains size distribution and crystallographic orientation. Many processing schemes have been developed to control film microstructure and surface roughness in practice, however, they usually have limited application related to specific material systems or growth conditions. A comprehensive model for structure development that incorporate deposition conditions and substrate material properties is still lacking. This thesis goal is to further the present understanding on polycrystalline film structure development with an emphasis on the correlation between surface morphology and underlying microstructure evolution. The growth of polycrystalline thin films at different deposition conditions has been explored through a combined characterization of surface structure and underlying microstructure evolution. Both early stage (before and after island coalescence) and later stage evolution (after film continuity) have been studied. Two distinct temporal regimes of film surface evolution: early surface smoothing regime followed by a roughening regime were explained based on the effects of grain growth process during film growth. The microstructure is characterized by development of a crystallographic texture in the initial regime, followed by continued grain growth and an asymptotically increase in the texture component in the later regime. The grain growth process has been identified as a combination of normal and abnormal grain growth mechanisms. Distinct surface morphologies develop during the later growth regime, indicative of different combination of mechanisms acting on specific length scales. The effect of the microstructure on surface morphology has been shown in a study of polycrystalline film evolution on different underlayers. Periodic ridges formed on vicinal Al(111) surfaces corresponding to near-(111) textured grains, and not on exact (111)-oriented grains. Alternatively, the effect of surface structure on the film microstructure has been shown in a study were nucleation of differently oriented grains at the film surface has been correlated with surface roughening during film growth. Advisors/Committee Members: Jr., John E. Sanchez, (advisor).

Subjects/Keywords: Correlation; Crystallographic; Deposition Parameters; Microstructure; Polycrystalline; Structure Evolution; Surface Structure; Thin Films

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lita, A. E. (2000). Correlation between microstructure and surface structure evolution in polycrystalline films. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/132620

Chicago Manual of Style (16^th Edition):

Lita, Adriana Eleni. “Correlation between microstructure and surface structure evolution in polycrystalline films.” 2000. Doctoral Dissertation, University of Michigan. Accessed March 02, 2021. http://hdl.handle.net/2027.42/132620.

MLA Handbook (7^th Edition):

Lita, Adriana Eleni. “Correlation between microstructure and surface structure evolution in polycrystalline films.” 2000. Web. 02 Mar 2021.

Vancouver:

Lita AE. Correlation between microstructure and surface structure evolution in polycrystalline films. [Internet] [Doctoral dissertation]. University of Michigan; 2000. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2027.42/132620.

Council of Science Editors:

Lita AE. Correlation between microstructure and surface structure evolution in polycrystalline films. [Doctoral Dissertation]. University of Michigan; 2000. Available from: http://hdl.handle.net/2027.42/132620

4. Templin, Brandon Chandler. Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor.

Degree: PhD, Mechanical Engineering, 2014, Mississippi State University

URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022014-113740/ ;

► A material model capable of reproducing the anisotropic behavior of polycrystalline materials will prove to be useful in simulations in which directional properties are… (more)

Subjects/Keywords: polycrystalline; texture; orientation distribution function; structure tensor; anisotropy; EMMI

…of a polycrystalline material include grain size and shape, interstitial atoms, cell… …the presented model in future work. 3 1.2 Microstructure Development Polycrystalline… …anisotropic behavior of a polycrystalline aggregate is not effected by the orientation of a single… …x5D;. Processing conditions present in the fabrication of polycrystalline metals can produce… …described as the first to incorporate the 12 FCC slip systems into a polycrystalline 8…

4 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Templin, B. C. (2014). Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor. (Doctoral Dissertation). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022014-113740/ ;

Chicago Manual of Style (16^th Edition):

Templin, Brandon Chandler. “Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor.” 2014. Doctoral Dissertation, Mississippi State University. Accessed March 02, 2021. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022014-113740/ ;.

MLA Handbook (7^th Edition):

Templin, Brandon Chandler. “Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor.” 2014. Web. 02 Mar 2021.

Vancouver:

Templin BC. Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor. [Internet] [Doctoral dissertation]. Mississippi State University; 2014. [cited 2021 Mar 02]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022014-113740/ ;.

Council of Science Editors:

Templin BC. Towards modeling the anisotropic behavior of polycrystalline materials due to texture using a second order structure tensor. [Doctoral Dissertation]. Mississippi State University; 2014. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-07022014-113740/ ;

5. Paulson, Noah H. Structure-property linkages for polycrystalline materials using materials knowledge systems.

Degree: PhD, Mechanical Engineering, 2017, Georgia Tech

URL: http://hdl.handle.net/1853/60113

► Computational tools that are capable of rapidly exploring candidate microstructures and their associated properties are required to accelerate the rate of development and deployment of… (more)

Subjects/Keywords: Microstructure; Structure-property relationship; Polycrystalline; Titanium alloys; High cycle fatigue; Transition fatigue; Yield strength; Elastic modulus; Data science; Materials informatics; High-throughput; 2-point correlations; Computational model; Crystal plasticity; Reduced-order model; Extreme value statistics

…of transition fatigue performance in polycrystalline microstructures… …Volume Element S-P Structure-Property xii SUMMARY Computational tools that are capable of… …are developed to evaluate the properties and performance of polycrystalline microstructures… …in a reduced-dimensional space using PCA [38]. The structure-property (S-P… …been extended to processing-structure [28–30] and processingstructure-properties…

10 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Paulson, N. H. (2017). Structure-property linkages for polycrystalline materials using materials knowledge systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/60113

Chicago Manual of Style (16^th Edition):

Paulson, Noah H. “Structure-property linkages for polycrystalline materials using materials knowledge systems.” 2017. Doctoral Dissertation, Georgia Tech. Accessed March 02, 2021. http://hdl.handle.net/1853/60113.

MLA Handbook (7^th Edition):

Paulson, Noah H. “Structure-property linkages for polycrystalline materials using materials knowledge systems.” 2017. Web. 02 Mar 2021.

Vancouver:

Paulson NH. Structure-property linkages for polycrystalline materials using materials knowledge systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2017. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1853/60113.

Council of Science Editors:

Paulson NH. Structure-property linkages for polycrystalline materials using materials knowledge systems. [Doctoral Dissertation]. Georgia Tech; 2017. Available from: http://hdl.handle.net/1853/60113

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